Rayon spinning machine



July 12, 1932. R. w. NASH 1,867,023

RAYON SPINNING MACHINE Filed April 1, 1950 3 Sheets-Sheet 1 ATTORNEY July 12, 1932.

R. W. NASH RAYON SPINNING MACHINE Filed April 1, 1930 3 Sheets-Sheet 2 ATTORN EY July 12, 1932. N v R. w. NASH 1,867,023

RAYON SPINNING MACHINE Filed April 1, 1950 s Sheets-Sheet 3 1 19. 4 Tag 5 ATTORNEY Patented July 12, 1932 UNITED S ATES PATENT OFFICE BOY W'ITZEL 01' MORE, YORK, ABSIGNOB 'I'O DU PONT BAYON OF NEW YORK, H. Y, A CORPORATION OF DELAWARE BAYON srnnmre moms Application ma April 1, 1930. Serial Io. 440,703.

This invention relates to the manufacture of artificial silk and more particularly to a new and'improved bucket spinning arrange ment therefor.

According to one process of manufacturing artificial silk, a viscous liquid is extruded from a spinneret into a coagulating and/or regenerating bath to form filaments. These filaments are then passed over a godet wheel and guided vertically into a centrifugal spinning box through the agency of a" funnel. This funnel is axially mounted with respect to the spimiing box and has means associated therewith for efiecting the axial reciprocation thereof between predetermined limits. As the filaments emerge from the stem of the funnel they are drawn against the inside wall of the spinning box by centrifugal force and collected in the form of a cake. It is very essential that the stem of the funnel recipro cate at a very uniform and smooth running speed in order to obviate the laying of the filaments in ridges in the spinning bucket.

The invention accordingly provides a new and improved means whereby the funnel with its associated guide stem is axially reciprocated at a smoothly running speed.

In a concrete exemplification of the present invention, the inning funnel is mounted at one end of a el arm, the .other end being hinged or otherwise connected to a traverse bar which is reciprocated through the medium of a connecting rod in response to the actuation of a shaft. Means are pic in the rotation of said shaft. In this manner, the feeding point at the foot of the funnel stem is reciprocated between predeterclaims parts will be identified by s vided for reacting against sudden changes its objects and advantages, the mode of its operation and the manner of its organization ma be better understood by referring to the Y fol owing description taken in connection with the accompan g drawings forming a part thereof, in w ich:

Figure 1 shows a front elevation partly in section of the assembled device;

Figure 2 shows a sectional side elevation taken on line 2-2 of Figure 1; Figure 3 is a section taken on line 3-3 of Figure '2;

Figure 4 is a section taken on line 4--4 of Figure 1;

Figure 5 is a section taken on line 5-5 of Figure 4;

Figure 6 is 'a section taken on line 6'6 of Figure 2; and

Figure 7 is a top lan view artly in section showing details of a modi ed construction which can taken the place of the hydraulic unit shown in Figures 4, 5 and6.

Like reference characters denote like parts in the several figures of the drawings.

In the following description and in the p c names for convenience, but they are intendedto be as generic in their application to similar parts as the art will permit.

Referring more particularly to the accompanying drawings, there is shown a spinning bucket 1 (Figure 2), which is rotated b any suitable means. Extending inside 0 said spinning bucket is a stem 2 which is provided with a plurality of constrictions 3 and which terminates at one end thereof in a glass funnel 4.. This stem 2 is embraced by a sleeve 6 which is positioned adjacent the funnel 4, and which has a threaded engagement with one end of a funnel arm 7, the other end of which is preferably hinged at 9 to a traverse bar 8. This traverse bar 8 has connected therewith a slide rod 10 mounted for reciprocating motion in bearings 11 secured to the framework 12 of the assembly. This framework 12 has mounted on both sides thereof duplicate spinning arrangements, as shown in Figure 2.

Pivotally mounted intermediate the ends of the slide rod 10 is a connecting link 13, the

' tion therein of one end of a bifurcated member 20. This bifurcated member 20 is fixedly secured to the arm 16 through the agency of a bolt 21 which passes through an elongated slot 19 in said member. It should be noted that this arm 16 with its associated bifurcated member 20 is similar to the rocker arm arrangement 14. The forked portion of the bifurcated member 20 has pivotally mounted between the prongs thereof one end of a bifurcated member 22, the forked portion of which has pivotally mounted therebetween one end of a lever arm 23. The other end of said lever arm 23 is connected to a hydraulic unit 24. This hydraulic unit is mounted on the frame structure 12 of the assembly by .means of bolts 25 and comprises a cylindrical casin 26 (Figures 4, 5, and 6), which is divide into two compartments by a fixed partition 27. In the center of said casing 26 is arranged a hollow spindle 28 to which the lever arm 23 is fixedly secured and provided with two blades 29 and 30 which act as rotary pistons upon actuation by the lever arm 23 and separate each of the compartments into two chambers. The cylindrical casing 26 is closed by a disc 31 and the whole assembly is covered by a cover 32 so as to define with said disc'31 a chamber 33. Said cover 32 is provided with a screw plug 34 which is tapped into a hole 35. This hole serves as a means for filling the chamber 33 with glycerin or other suitable liquid. The hollow spindle 28 is provided with radially extending conduits 36 and 37 which serve as a means of communication between each of the compartments of the cylindrical casin 26. The chamber 33 communicates with eac of the compartments of the cylindrical casing 26 by means of valves 40 which are automatically opened in order to allow li uid to pass into the compartments and close to prevent any liquid from returning into the chamber 33. During the movement of the blades 29 and 30, there takes place alternately at each .side of the partition 27 a period of depression and suction which has a tendency to open the valves 40 and consequently to draw into the compartments a quantity of liquid corresponding to that escaping throu h the stufling box 48 of the arrangement. e blades 29 and 3.0 are provided with conduits 41 leading into the interior of the hollow spindle 28, as shown in Figures 4 and 5. The freeopenings of said conduits 41 are closed by plates 42-which are secured to the valve by means of rivets 43 and which serve as flap valves for the conduits 41. Mounted inside the spindle 28 is a spindle 44, the end of which is provided with an integral collar 46 adjacent the threaded portion 45 of the spindle 28. This threaded portion 45 and collar 46 are embraced by a nut 47 which serves to hold the lever arm 23 in place. This lever arm is fixedly secured to thespindle' 28 by any suitable means. 7

In the operation of this hydraulic unit 24, the movement of the rock shaft 15 is transmitted by means of the lever arm 23 to the blades 29 and 30 which rotate in the glycerin filled chamber of the casing 26. Any sudden changes in the movement of the rock shaft 15 is dampened, braked and/or resisted by the rotation of the blades29 and 30 in their respective compartments. As these blades 29 and 30 are rotated, there takes place alternately at each end of the partition a period of depression and suction with a corresponding increase or decrease of pressure. This change of pressure is equalized through the conduits 36 and 37. Any sudden changes in pressure in the compartments of the casing 26 as the, result of the rotation of the blades 29 and 30 is relieved through the flap valves 42. In this manner any accelerating or decelerating force acting on the rock shaft 15 which wou d tend to cause sudden changes in its movement between predetermined limits of rotation would be counteracted through the efiect of this hydraulic unit 24. It should be noted that an sudden changes in the rotation of said rock s aft 15 may be due to'the irregularities in the operation of the cam arrangement associated therewith or may be transmitted to said rock shaft by the connecting link 13. It shouldalso be noted that the sliding rod 10 and the associatedbearings 11 are so arranged in position with respect to the spinning bucket 1 that any lubricant that might be applied to these hearings may find its. way into the spinning bucket resulting thereb in the contamination of the cake forme therein. B this new and improved arrangement, the lu rication of said bearings 11 can be eliminated so as to obviate any such possible contamination.

Figure 7 shows a modified form of mechanism which can replace the hydraulic unit 24. In this modified arrangement, the end of the lever arm 23 is rovided with a seat 50 which cooperates with a rubber member 51 having a surface which conforms with said Seat 50 and which is fixedly mounted with respect to a bracket 52 by any suitable means. This bracket 52 is mounted on the framework 12 in a position corresponding to the position of the hydraulic unit 24, as shown in Figures 1 and 2. Passing throu h the lever arm 23, the member 51- and tl16%13.(3k6t 52, is a bolt 53. Through the instrumentality of this ar- 2 7 n m oi the as 1 M21: iliustrated and in its operaeioa 1., d9 by those skilled in the art with g from the spirit of the invennation comprisin spinning bucket, a i nel adapted to guide thread Elements in the interior of said spin ning bucket, a shaft, means responsive to the rotation said shaft for axiali reciprceating funnel between pre etermined limits, and means responsive to any accelerating or decelerating force on said shaft for braking or dampening said force whereby any intermediate reciprocation of said funnel between said predetermined limits is obviated.

2, In a machine for the manufacture of, tificial siik, the combination comprisin" a spinnin hucket,guiding means for guiding thread filaments in the interior of said spinning bucket, an arm secured to said guiding means, a rod connected to said arm, a rock shaft adapted to reciprocate said rod, means for rocking said shaft whereby said guiding means is reciprocated between predetermined limits, and shock absorbin means for braking or dampening -any c anges in the movement of said guiding means between said predetermined limits.

3. In a machine for the manufacture of artificial silk, the combination comprising a spinning bucket, guiding means for aiding thread filaments in the interior of said spinning bucket, means for reciprocating said guiding means between predetermined limits. and shock absorbing means for braking or dampening any sudden changes in the movement of said iding means between said predetermined llmits.

4. In a machine for the manufacture of artificial silk, the combination comprising spinnin bucket, a funnel adapted to guide thread aments in the interior of said spinning bucket, a traverse bar associated with said funnel, a shaft, :1 rod connec between said traverse bar and said shaft, me for rocking said shaft between predetcrmin limits, and shock absorbing means connected to said shaft for braking or dampening an sudden changes in the rotation of said she between said predetermined limits.

5. In a machine for the manufacture of artificiai silk, the combination comprising a a. i: .a ,w a e n 111318 2.01 tile manniactarc L means between predetermined limits,

sno' absorbing means for breaking or de any sudden changes in the mover of guiding means between said pr termined limits.

G. In a machine for the menu. 1T8 oi silk, combination coinpr' mg bucket, guiding means nl 'n-entsin i. A, w, means for reciprong means between predeter i s, and actuated means for any sudden changes in the moven w v gniding means tween said predetermined i". in a machine for the tiiiciai silk, the combination can a spinning bucket, means for guiding thread filaments in. the interior of said spin 0 bucket, a shaft, means responsive to the retation of said shaft for reciproc guiding means between predates its, an arm secured to said shaft, a .ever a n one end thereof mounted "c a pivot point, a member pivotally me be tween the free ends of said a e .d said iever arm and means associated with sai I W 

